2012 Limited w/ 110k miles. The salty winter roads in Boston claimed another caliper. I was replacing front pads + rotors and found one of the pistons on my original calipers was frozen/seized. After reading other posts I decided to go with NAPA remanufactured calipers (no affiliation) over OEM ones mostly due to cost. NAPA charged about $100 each, vs OEM at the dealership being $480 each. I did find OEM's online for $280 but needed to be back on the road fast. The brake tubing was also rusted solid to the caliper, so I had to cut and replace those as well (P/N 47317-60131 Tube Front Brake No.7).
For anyone that finds this post in the future, the NAPA calipers seem like they're decent quality. Unless I update this post, you can assume they're still running strong on my 4Runner.
these napa calipers are toyota used .. probably from a scrap yard wreck..
you must use silicone brake grease on the caliper piston boot and the slides..
I still have the same calipers on my 1996 and 2000..
when you rotate tires you do the brake inspection...in spring do clean and lube if we get the nasty winters.